Cigfa is the Welsh mythological princess of the Third Branch of the Mabinogion — daughter of Gwyn the Beardless, wife of Pryderi son of Pwyll of Dyfed.
Featured in the Mabinogion.
Cigfa does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Cigfa reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.